The SMAP Summit
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A weekend trilateral summit among the leaders of Japan, South Korea and China featured the impromptu (uh-huh) a cappella serenading of Chinese Premier Wen Jiabao by Japanese "boy band" (if you can use the term for a group that made its debut 20 years ago) SMAP. More on SMAP here. More on Wen Jiabao here and here.